using System.Collections;
using System.ComponentModel;
using System.Runtime.CompilerServices;
using System.Runtime.InteropServices;

internal class Program
{
    private const long mod = 998244353;

    
    public static void Main(string[] args)
    {
        int[] line = Console.ReadLine().Split(' ').Select(int.Parse).ToArray();
        int n = line[0];
        int x = line[1];
        int[] a = Console.ReadLine().Split(' ').Select(int.Parse).ToArray();
        long sum = 0;
        for (int i = 0; i < n; i++) sum += a[i];
        if (sum <= x)
        {
            Console.WriteLine(sum);
            return;
        }

        int r = 0;
        sum = 0;
        long ans = 0;
        for (int l = 0; l < n; l++)
        {
            while (sum + a[r] <= x)
            {
                sum += a[r];
                r++;
                if (r == n) r = 0;
            }
            //Console.WriteLine("{0},{1}",l,sum);
            ans = Math.Max(ans, sum);
            sum -= a[l];
        }
        Console.WriteLine(ans);
    }

    public static List<int> mkar(int n, int val)
    {
        List<int> res = new List<int>(n);
        for(int i=0;i<n;i++)res.Add(val);
        return res;
    }
}